CF

carbon film leaded resistors

Resistance

Range

E-24

(G±2%)

Resistance

Range

E-24

(J±5%)

Part

Designation

Absolute

Maximum

Working

Voltage

Absolute

Maximum

Overload

Voltage

Power

Rating

@ 70°C

applications and ratings

Minimum

Dielectric

Withstanding

Voltage

CFS1/4

CFPS1/4

CF1/4

CFP1/4

CFS1/2

CFPS1/2

0.25W

0.50W

300V

500V

600V

700V

250V

300V

350V

500V

700V

2.2Ω - 1MΩ

2.2Ω - 47kΩ 51kΩ - 100kΩ 110kΩ - 330kΩ

110kΩ - 330kΩ

2.2Ω - 100kΩ

100kΩ - 1MΩ

360kΩ - 1MΩ

—

—

—

1.1MΩ - 2.2MΩ

1.0Ω - 91kΩ

2.2Ω - 91kΩ

10Ω - 330kΩ

10Ω - 100kΩ

10Ω - 1MΩ

2.2Ω - 1MΩ

2.2Ω - 1MΩ

2.2Ω - 5.1MΩ

1.0Ω - 5.1MΩ

Derating Curve

environmental applications

100

80

60

40

20

-60

-40

0

40

6080

100160

70

20

Ambient Temperature

(°C)

0

-55

120

155

-20

140

Surface Temperature Rise

60

50

40

30

20

0

25

50

75

% Rated Power

0

100

10

CFPS1/4

CFS1/4

CFS1/2

CFB1/2

Load Life @ 70°C, 1000 Hr

+2

+1

0

10

100

1 k

10k

Resistance

(Ω)

-2

100k

-1

1M

CFS1/4

Performance Characteristics

T.C.R.

(ppm/°C)

+350 to -450

0 to -700

0 to -1000

0 to -1300

360kΩ - 1MΩ

1.1MΩ - 5.1MΩ

2.4MΩ - 5.1MΩ

2.2Ω - 1MΩ

Parameter

Requirement ∆ R ±(% + 0.05Ω)

Limit

Typical

Test Method

Resistance

T.C.R.

Measuring points are at 10mm ±1mm from the end cap.

Room temperature +100°C

Within specified

tolerance

Within specified

T.C.R.

—

—

Overload (Short time)

Rated voltage x 2.5 or max. overload voltage for 5 seconds, whichever is lower

±1%

±0.5%

Resistance to Solder Heat

260°C ±5°C, 10 seconds ± 1 second

±1%

±0.5%

Rapid Change of Temperature

-55°C (30 minutes), +125°C (30 minutes), 5 cycles

±1%

±0.5%

Terminal Strength

Twist 360°C, 5 times

No lead-coming off

and loose terminals

—

Moisture Resistance

40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle

±5%

±2.5%

Resistance to Solvent

(CFS & CFPS only)

Ultrasonic washing with Isopropyl alcohol for 2 minutes.

No abnormality

in appearance.

Marking shall be

easily legible.

––

Flame Retardant

(CFS & CFPS only)

Flame test: The test flame shall be applied and removed for each 15 seconds

respectively to repeat the cycle 5 times.

Overload flame retardant: Power (AC) corresponding to 2, 4, 8, 16 and 32

times the power rating shall be applied for each 1 minute until disconnection

occurs. However the applied voltage shall not exceed 4 times the maximum

operating voltage.

No evidence

of flaming or

self-flaming

––

Endurance at 70°C

70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle

±3%

±1.5%

108

KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com

Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.

12/18/12

For resistors operated at an ambient temperature

of 70°C or above, a power rating shall be derated

in accordance with the above derating curve.